Camera optical lens including seven lenses of +−−+−+− or +−−+++− refractive powers

ABSTRACT

The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: an aperture; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. The camera optical lens satisfies following conditions: 11.00≤f2/f1≤−6.00; and 5.00≤d7/d6≤10.00, where f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; d7 denotes an on-axis thickness of the fourth lens; and d6 denotes an on-axis distance from an image side surface of the third lens to an object side surface of the fourth lens.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and more particularly, to a camera optical lens suitable for handheld terminal devices such as smart phones or digital cameras and camera devices such as monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but in general the photosensitive devices of camera lens are nothing more than Charge Coupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices become smaller, plus the current development trend of electronic products towards better functions and thinner and smaller dimensions, miniature camera lenses with good imaging quality therefore have become a mainstream in the market.

In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure, or even five-piece or six piece lens structure. Also, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, a seven-piece lens structure gradually appears in lens designs. Although the common seven-piece lens has good optical performance, its settings on refractive power, lens spacing and lens shape still have some irrationality, which results in that the lens structure cannot achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 2 of the present disclosure;

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 3 of the present disclosure;

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9;

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9;

FIG. 13 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 4 of the present disclosure;

FIG. 14 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 13;

FIG. 15 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 13;

FIG. 16 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 13;

FIG. 17 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 5 of the present disclosure;

FIG. 18 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 17;

FIG. 19 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 17; and

FIG. 20 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 17.

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1, the present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment 1 of the present disclosure. The camera optical lens 10 includes 7 lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side, an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. An optical element such as a glass plate GF can be arranged between the seventh lens L7 and an image plane Si. The glass plate GF can be a glass cover plate or an optical filter. In other embodiments, the glass plate GF can be arranged at other positions.

In present embodiment, the first lens L1 has a positive refractive power, and has an object side surface being a convex surface and an image object surface being a concave surface; the second lens L2 has a negative refractive power, and has an object side surface being a convex surface and an image object surface being a concave surface; the third lens L3 has a negative refractive power, and has an object side surface being a convex surface and an image object surface being a concave surface; the fourth lens L4 has a positive refractive power, and has an object side surface being a convex surface and an image object surface being a convex surface; the fifth lens L5 has a negative refractive power, and has an object side surface being a convex surface and an image object surface being a concave surface; a sixth lens L6 has a positive refractive power, and has an object side surface being a convex surface and an image object surface being a convex surface; and the seventh lens L7 has a negative refractive power, and has an object side surface being a concave surface and an image object surface being a concave surface.

A focal length of the first lens L1 is defined as f1, and a focal length of the second lens L2 is defined as f2. The camera optical lens 10 should satisfy a following condition: −11.00≤f2/f1≤≤6.00  (1).

An on-axis thickness of the fourth lens is defined as d7, and an on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is defined as d6. The camera optical lens 10 should satisfy a following condition of: 5.00≤d7/d6≤10.00  (2).

The condition (1) specifies a ratio of the focal length of the first lens L1 and the focal length of the second lens L2. This leads to the appropriate distribution of the refractive power for the first lens L1 and the second lens L2, thereby facilitating correction of aberrations of the camera optical lens and thus improving the imaging quality.

The condition (2) specifies a ratio of the on-axis thickness of the fourth lens L4 and the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4. This can facilitate shortening a total length of the camera optical lens while achieving ultra-thin lenses.

In this embodiment, with the above configurations of the lenses including respective lenses (L1, L2, L3, L4, L5, L6 and L7) having different refractive powers, in which there is a specific relationship between focal lengths of the first lens L1 and the second lens L2, the refractive power of the first lens L1 and the refractive power of the second lens L2 can be effectively allocated; moreover, a ratio of the on-axis thickness of the fourth lens L4 and the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 is specified, thereby facilitating correction of aberrations of the camera optical lens. This can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

In an example, a curvature radius of the object side surface of the fourth lens L4 is defined as R7 and a curvature radius of the image side surface of the fourth lens L4 is defined as R8, where R7 and R8 satisfy a condition of: −2.00≤(R7+R8)/(R7−R8)≤−1.00  (3).

The condition (3) specifies a shape of the fourth lens L4. This can alleviate a deflection degree of light passing through the lens, thereby effectively reducing aberrations.

In an example, an on-axis thickness of the first lens L1 is defined as d1, and an on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 is defined as d2, where d1 and d2 satisfy a condition of: 8.00≤d1/d2≤15.00  (4).

The condition (4) specifies a ratio of the on-axis thickness of the first lens L1 and the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2. This can facilitate processing and assembly of the lenses.

In addition, a surface of a lens can be set as an aspherical surface. The aspherical surface can be easily formed into a shape other than the spherical surface, so that more control variables can be obtained to reduce the aberration, thereby reducing the number of lenses and thus effectively reducing a total length of the camera optical lens according to the present disclosure. In an embodiment of the present disclosure, both an object side surface and an image side surface of each lens are aspherical surfaces.

It should be noted that the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 that constitute the camera optical lens 10 of the present embodiment have the structure and parameter relationships as described above, and therefore, the camera optical lens 10 can reasonably distribute the refractive power, the surface shape, the material, the on-axis thickness and the like of each lens, and thus correct various aberrations. The camera optical lens 10 has Fno≤1.43. A total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis (TTL) and an image height (IH) of the camera optical lens 10 satisfy a condition of TTL/IH≤1.46. The field of view (FOV) of the camera optical lens 10 satisfies FOV≥78.00 degrees. This can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

In an example, inflexion points and/or arrest points can be arranged on the object side surface and/or image side surface of the lens, so as to satisfy the demand for the high quality imaging. The description below can be referred to for specific implementations.

FIG. 1 is a schematic diagram of a structure of the camera optical lens 10 in accordance with Embodiment 1 of the present disclosure. The design information of the camera optical lens 10 in Embodiment 1 of the present disclosure is shown in the following.

Table 1 lists curvature radiuses of object side surfaces and images side surfaces of the first lens L1 to the seventh lens L7 constituting the camera optical lens 10, on-axis thicknesses of the lenses, distances between the lenses, the refractive index nd and the abbe number vd according to Embodiment 1 of the present disclosure. Table 2 shows conic coefficients k and aspheric surface coefficients. It should be noted that each of the distance, radii and the central thickness is in a unit of millimeter (mm).

TABLE 1 R d nd νd S1 ∞ d0= −0.775 R1 2.426 d1= 1.335 nd1 1.5357 ν1 74.64 R2 7.369 d2= 0.124 R3 4.265 d3= 0.233 nd2 1.6610 ν2 20.53 R4 3.655 d4= 0.611 R5 16.913 d5= 0.233 nd3 1.6610 ν3 20.53 R6 7.004 d6= 0.066 R7 11.854 d7= 0.542 nd4 1.5444 ν4 55.82 R8 69.891 d8= 0.279 R9 3.288 d9= 0.309 nd5 1.6359 ν5 23.82 R10 2.704 d10= 0.275 R11 2.618 d11= 0.552 nd6 1.5444 ν6 55.82 R12 −21.220 d12= 0.610 R13 −4.178 d13= 0.518 nd7 1.5346 ν7 55.69 R14 4.020 d14= 0.615 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.172

In the table, meanings of various symbols will be described as follows.

R: curvature radius of an optical surface;

S1: aperture;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of the object side surface of the seventh lens L7;

R14: curvature radius of the image side surface of the seventh lens L7;

R15: curvature radius of an object side surface of the glass plate GF;

R16: curvature radius of an image side surface of the glass plate GF;

d: on-axis thickness of a lens or an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7;

d13: on-axis thickness of the seventh lens L7;

d14: on-axis distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF;

d15: on-axis thickness of the glass plate GF;

d16: on-axis distance from the image side surface of the glass plate GF to the image plane Si;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

nd6: refractive index of d line of the sixth lens L6;

nd7: refractive index of d line of the seventh lens L7;

ndg: refractive index of d line of the glass plate GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

v7: abbe number of the seventh lens L7;

vg: abbe number of the glass plate GF.

TABLE 2 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10 A12 A14 A16 R1 −1.0037E−01 −9.9625E−04 4.8364E−04 −8.3182E−04 4.1476E−04 −1.6828E−04  3.1812E−05 −3.0631E−06 R2 −2.3815E+01 −3.3883E−02 1.6923E−02 −5.9006E−03 1.4799E−03 −3.7026E−04  7.3997E−05 −7.2038E−06 R3  4.3939E+00 −7.0999E−02 3.2191E−02 −7.7865E−03 2.7088E−03 −1.2686E−03  3.2113E−04 −2.2763E−05 R4  4.2305E+00 −3.9817E−02 6.1045E−03  2.3542E−02 −2.8393E−02   1.7236E−02 −5.5414E−03  7.3322E−04 R5  9.9100E+01 −4.6678E−02 2.6015E−02 −5.5864E−02 5.0805E−02 −2.6480E−02  7.1741E−03 −7.7397E−04 R6 −6.2812E+01 −4.0936E−02 4.6805E−02 −7.3576E−02 5.2550E−02 −2.1913E−02  5.1501E−03 −5.0358E−04 R7 −3.2440E+01 −4.9600E−02 4.5322E−02 −4.3314E−02 1.9454E−02 −4.0595E−03  3.7966E−04 −1.0111E−05 R8 −4.3074E+01 −5.3869E−02 1.7505E−02 −1.1531E−02 3.4295E−03  1.2683E−04 −2.8105E−04  4.4414E−05 R9 −3.6080E+01 −1.8309E−02 −4.2102E−03   1.4372E−02 −1.2165E−02   4.0937E−03 −6.4170E−04  3.9317E−05 R10 −1.9272E+01 −7.7573E−02 2.6459E−02  5.8320E−03 −9.3090E−03   3.1307E−03 −4.4314E−04  2.3178E−05 R11 −8.3572E+00  2.2193E−03 −5.3836E−02   3.4448E−02 −1.1807E−02   2.1330E−03 −1.9146E−04  6.8422E−06 R12  3.9727E+01  5.0543E−02 −6.3985E−02   2.8713E−02 −7.2505E−03   1.0303E−03 −7.5400E−05  2.2006E−06 R13 −5.6813E−01 −8.6479E−02 2.3694E−02 −1.9249E−03 −5.3747E−05   1.8882E−05 −1.1532E−06  2.3662E−08 R14 −2.5325E+01 −5.4521E−02 1.7175E−02 −3.1502E−03 3.3459E−04 −2.0992E−05  7.2586E−07 −1.0560E−08

In Table 2, k is a conic coefficient, and A4, A6, A8, A10, A12, A14 and A16 are aspheric surface coefficients.

In the present embodiment, an aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (5). However, the present disclosure is not limited to the aspherical polynomials form shown in the condition (5). Y=(x ² /R)/{1+[1−(1+k)(x ² /R ²)]^(1/2) }+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰ +A12x ¹² +A14x ¹⁴ +A16x ¹⁶  (5)

Table 3 and Table 4 show design data of inflexion points and arrest points of respective lens in the camera optical lens 10 according to Embodiment 1 of the present disclosure. P1R1 and P1R2 represent the object side surface and the image side surface of the first lens L1, respectively, P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, respectively, P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, respectively, P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, respectively, P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, respectively, P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6, respectively, and P7R1 and P7R2 represent the object side surface and the image side surface of the seventh lens L7, respectively. The data in the column named “inflexion point position” refers to vertical distances from inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” refers to vertical distances from arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3 Number of Inflexion Inflexion Inflexion Inflexion inflexion point point point point points position 1 position 2 position 3 position 4 P1R1 1 1.765 P1R2 1 0.675 P2R1 P2R2 P3R1 1 0.355 P3R2 2 0.525 1.525 P4R1 2 0.445 1.455 P4R2 2 0.155 1.705 P5R1 2 0.655 2.105 P5R2 2 0.505 2.335 P6R1 2 0.705 2.205 P6R2 4 0.355 0.545 2.255 2.735 P7R1 1 1.635 P7R2 2 0.535 3.445

TABLE 4 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 P1R2 1 1.445 P2R1 P2R2 P3R1 1 0.615 P3R2 1 0.875 P4R1 2 0.805 1.725 P4R2 1 0.265 P5R1 1 1.255 P5R2 1 1.115 P6R1 1 1.265 P6R2 P7R1 1 3.085 P7R2 1 1.085

In addition, Table 21 below further lists various values of Embodiment 1 and values corresponding to parameters which are specified in the above conditions.

FIG. 2 illustrates a longitudinal aberration of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 10 according to Embodiment 1, and FIG. 3 illustrates a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 10 according to Embodiment 1. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 587 nm after passing the camera optical lens 10 according to Embodiment 1, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In this embodiment, a full FOV of the camera optical lens is 2ω, and an F number is Fno, where 2ω=78.07° and Fno=1.43. Thus, the camera optical lens 10 can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

Embodiment 2

FIG. 5 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 2 of the present disclosure. Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0= −0.775 R1 2.425 d1= 1.330 nd1 1.5357 ν1 74.64 R2 7.405 d2= 0.116 R3 4.458 d3= 0.230 nd2 1.6610 ν2 20.53 R4 3.715 d4= 0.597 R5 16.345 d5= 0.251 nd3 1.6610 ν3 20.53 R6 7.062 d6= 0.089 R7 9.663 d7= 0.536 nd4 1.5444 ν4 55.82 R8 31.564 d8= 0.298 R9 3.352 d9= 0.326 nd5 1.6359 ν5 23.82 R10 2.769 d10= 0.269 R11 2.623 d11= 0.607 nd6 1.5444 ν6 55.82 R12 −20.293 d12= 0.607 R13 −4.158 d13= 0.516 nd7 1.5346 ν7 55.69 R14 3.990 d14= 0.615 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.099

TABLE 6 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10 A12 A14 A16 R1 −9.3927E−02 −5.8265E−04 4.9146E−04 −8.1478E−04 4.2316E−04 −1.6638E−04  3.2255E−05 −2.9057E−06 R2 −1.2609E+01 −3.2086E−02 1.6719E−02 −5.8595E−03 1.5212E−03 −3.6088E−04  7.3127E−05 −7.9570E−06 R3  4.4270E+00 −6.7061E−02 3.3255E−02 −7.9745E−03 2.6783E−03 −1.2226E−03  3.3794E−04 −2.9384E−05 R4  4.1695E+00 −4.2927E−02 1.0000E−02  2.3740E−02 −2.8715E−02   1.7155E−02 −5.5212E−03  7.6731E−04 R5  9.8987E+01 −4.6935E−02 2.6670E−02 −5.5784E−02 5.0709E−02 −2.6552E−02  7.1520E−03 −7.4867E−04 R6 −5.4096E+01 −4.0448E−02 4.6459E−02 −7.3666E−02 5.2525E−02 −2.1920E−02  5.1480E−03 −5.0429E−04 R7 −8.4923E+00 −4.8420E−02 4.4823E−02 −4.3505E−02 1.9417E−02 −4.0632E−03  3.7983E−04 −8.0535E−06 R8 −9.0000E+01 −5.4992E−02 1.7403E−02 −1.1459E−02 3.4459E−03  1.2929E−04 −2.8086E−04  4.4347E−05 R9 −3.4777E+01 −1.9196E−02 −4.3513E−03   1.4382E−02 −1.2160E−02   4.0952E−03 −6.4137E−04  3.9380E−05 R10 −1.8052E+01 −7.7345E−02 2.6443E−02  5.8281E−03 −9.3094E−03   3.1306E−03 −4.4315E−04  2.3177E−05 R11 −8.0833E+00  2.6057E−03 −5.3800E−02   3.4446E−02 −1.1807E−02   2.1328E−03 −1.9148E−04  6.8383E−06 R12  4.1762E+01  5.0280E−02 −6.3994E−02   2.8714E−02 −7.2503E−03   1.0303E−03 −7.5397E−05  2.2008E−06 R13 −5.4879E−01 −8.6519E−02 2.3689E−02 −1.9250E−03 −5.3731E−05   1.8883E−05 −1.1531E−06  2.3669E−08 R14 −2.6393E+01 −5.4568E−02 1.7174E−02 −3.1499E−03 3.3461E−04 −2.0991E−05  7.2588E−07 −1.0562E−08

Table 7 and Table 8 show design data of inflexion points and arrest points of respective lens in the camera optical lens 20 according to Embodiment 2 of the present disclosure.

TABLE 7 Number of Inflexion Inflexion Inflexion Inflexion inflexion point point point point points position 1 position 2 position 3 position 4 P1R1 1 1.875 P1R2 1 0.835 P2R1 P2R2 P3R1 1 0.365 P3R2 2 0.545 1.585 P4R1 2 0.535 1.485 P4R2 2 0.225 1.685 P5R1 2 0.655 2.075 P5R2 2 0.515 2.335 P6R1 2 0.715 2.225 P6R2 4 0.375 0.525 2.255 2.735 P7R1 1 1.645 P7R2 2 0.535 3.425

TABLE 8 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 P1R2 1 1.755 P2R1 P2R2 P3R1 1 0.625 P3R2 1 0.885 P4R1 2 0.915 1.725 P4R2 2 0.395 1.885 P5R1 1 1.245 P5R2 1 1.135 P6R1 1 1.275 P6R2 P7R1 1 3.125 P7R2 1 1.075

In addition, Table 21 below further lists various values of Embodiment 2 and values corresponding to parameters which are specified in the above conditions.

FIG. 6 illustrates a longitudinal aberration of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 20 according to Embodiment 2, and FIG. 7 illustrates a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 587 nm after passing the camera optical lens 20 according to Embodiment 2, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the camera optical lens 20 according to this embodiment, 2ω=78.73° and Fno=1.43. Thus, the camera optical lens 20 can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

Embodiment 3

FIG. 9 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 3 of the present disclosure. Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0= −0.775 R1 2.433 d1= 1.332 nd1 1.5357 ν1 74.64 R2 7.421 d2= 0.119 R3 4.347 d3= 0.230 nd2 1.6610 ν2 20.53 R4 3.708 d4= 0.595 R5 16.635 d5= 0.245 nd3 1.6610 ν3 20.53 R6 7.117 d6= 0.064 R7 13.555 d7= 0.605 nd4 1.5444 ν4 55.82 R8 452.716 d8= 0.252 R9 3.534 d9= 0.322 nd5 1.6359 ν5 23.82 R10 2.908 d10= 0.263 R11 2.620 d11= 0.566 nd6 1.5444 ν6 55.82 R12 −21.762 d12= 0.614 R13 −4.156 d13= 0.535 nd7 1.5346 ν7 55.69 R14 4.015 d14= 0.615 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.131

TABLE 10 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10 A12 A14 A16 R1 −7.8656E−02 −7.6921E−04 5.8686E−04 −8.0113E−04 4.1671E−04 −1.6960E−04  3.1811E−05 −2.8776E−06 R2 −1.8382E+01 −3.2565E−02 1.6974E−02 −5.9668E−03 1.4855E−03 −3.6285E−04  7.5384E−05 −7.8596E−06 R3  4.2540E+00 −6.5865E−02 3.1625E−02 −7.9870E−03 2.7444E−03 −1.2301E−03  3.3108E−04 −2.6131E−05 R4  4.4475E+00 −3.7514E−02 6.1991E−03  2.3423E−02 −2.8436E−02   1.7227E−02 −5.5332E−03  7.4793E−04 R5  9.8734E+01 −4.6437E−02 2.6278E−02 −5.5806E−02 5.0774E−02 −2.6506E−02  7.1605E−03 −7.7096E−04 R6 −5.4139E+01 −4.1247E−02 4.6736E−02 −7.3612E−02 5.2529E−02 −2.1926E−02  5.1439E−03 −5.0490E−04 R7 −1.2008E+01 −4.9025E−02 4.5160E−02 −4.3380E−02 1.9443E−02 −4.0583E−03  3.8137E−04 −9.3234E−06 R8 −8.7159E+01 −5.4930E−02 1.7604E−02 −1.1473E−02 3.4390E−03  1.2744E−04 −2.8108E−04  4.4339E−05 R9 −3.4708E+01 −1.9963E−02 −4.0221E−03   1.4367E−02 −1.2162E−02   4.0939E−03 −6.4164E−04  3.9330E−05 R10 −1.8683E+01 −7.6655E−02 2.6424E−02  5.8270E−03 −9.3096E−03   3.1306E−03 −4.4315E−04  2.3177E−05 R11 −8.2726E+00  2.8241E−03 −5.3742E−02   3.4449E−02 −1.1808E−02   2.1328E−03 −1.9148E−04  6.8389E−06 R12  3.9315E+01  5.0542E−02 −6.3985E−02   2.8713E−02 −7.2505E−03   1.0303E−03 −7.5400E−05  2.2006E−06 R13 −5.6344E−01 −8.6514E−02 2.3694E−02 −1.9248E−03 −5.3743E−05   1.8883E−05 −1.1531E−06  2.3666E−08 R14 −2.4774E+01 −5.4534E−02 1.7173E−02 −3.1502E−03 3.3459E−04 −2.0992E−05  7.2585E−07 −1.0561E−08

Table 11 and Table 12 show design data of inflexion points and arrest points of respective lens in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 11 Number of Inflexion Inflexion Inflexion Inflexion inflexion point point point point points position 1 position 2 position 3 position 4 P1R1 1 1.815 P1R2 1 0.745 P2R1 P2R2 P3R1 1 0.365 P3R2 1 0.535 P4R1 2 0.425 1.455 P4R2 2 0.065 1.695 P5R1 2 0.655 2.105 P5R2 2 0.515 2.335 P6R1 2 0.715 2.215 P6R2 4 0.345 0.555 2.255 2.745 P7R1 1 1.635 P7R2 2 0.535 3.455

TABLE 12 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 P1R2 1 1.595 P2R1 P2R2 P3R1 1 0.625 P3R2 1 0.885 P4R1 2 0.765 1.705 P4R2 2 0.105 1.895 P5R1 1 1.235 P5R2 1 1.125 P6R1 1 1.275 P6R2 P7R1 1 3.095 P7R2 1 1.095

In addition, Table 21 below further lists various values of Embodiment 3 and values corresponding to parameters which are specified in the above conditions.

FIG. 10 illustrates a longitudinal aberration of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 30 according to Embodiment 3, and FIG. 11 illustrates a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates field curvature and distortion of light with a wavelength of 587 nm after passing the camera optical lens 30 according to Embodiment 3, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the camera optical lens 30 according to this embodiment, 2ω=78.97° and Fno=1.43. Thus, the camera optical lens 30 can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

Embodiment 4

FIG. 13 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 4 of the present disclosure. Embodiment 4 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 13 and Table 14 show design data of a camera optical lens 40 in Embodiment 2 of the present disclosure.

TABLE 13 R d nd νd S1 ∞ d0= −0.775 R1 2.440 d1= 1.317 nd1 1.5357 ν1 74.64 R2 7.396 d2= 0.155 R3 4.107 d3= 0.232 nd2 1.6610 ν2 20.53 R4 3.669 d4= 0.588 R5 17.072 d5= 0.247 nd3 1.6610 ν3 20.53 R6 7.080 d6= 0.076 R7 14.539 d7= 0.610 nd4 1.5444 ν4 55.82 R8 809.402 d8= 0.240 R9 3.664 d9= 0.310 nd5 1.6359 ν5 23.82 R10 2.998 d10= 0.260 R11 2.629 d11= 0.566 nd6 1.5444 ν6 55.82 R12 −22.223 d12= 0.601 R13 −4.148 d13= 0.531 nd7 1.5346 ν7 55.69 R14 4.011 d14= 0.615 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.119

TABLE 14 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10 A12 A14 A16 R1 −1.2166E−01 −1.7468E−03 4.6133E−04 −8.2262E−04 4.1233E−04 −1.6825E−04  3.2314E−05 −2.8560E−06 R2 −1.3532E+01 −3.1949E−02 1.6517E−02 −6.0427E−03 1.4912E−03 −3.5747E−04  7.6501E−05 −8.1108E−06 R3  4.2869E+00 −6.5469E−02 3.1530E−02 −8.1666E−03 2.7126E−03 −1.2276E−03  3.3338E−04 −2.6010E−05 R4  4.4968E+00 −3.9283E−02 5.6373E−03  2.3648E−02 −2.8385E−02   1.7213E−02 −5.5481E−03  7.4092E−04 R5  9.8740E+01 −4.6203E−02 2.6369E−02 −5.5753E−02 5.0782E−02 −2.6504E−02  7.1624E−03 −7.6719E−04 R6 −5.6759E+01 −4.1357E−02 4.6796E−02 −7.3584E−02 5.2534E−02 −2.1923E−02  5.1454E−03 −5.0466E−04 R7 −1.0756E+01 −4.8999E−02 4.4997E−02 −4.3423E−02 1.9435E−02 −4.0586E−03  3.8202E−04 −8.7561E−06 R8  1.1081E+01 −5.5094E−02 1.7660E−02 −1.1446E−02 3.4436E−03  1.2780E−04 −2.8120E−04  4.4244E−05 R9 −3.3868E+01 −2.0114E−02 −4.0177E−03   1.4366E−02 −1.2162E−02   4.0941E−03 −6.4159E−04  3.9345E−05 R10 −1.8560E+01 −7.6651E−02 2.6404E−02  5.8242E−03 −9.3100E−03   3.1305E−03 −4.4316E−04  2.3175E−05 R11 −8.4236E+00  2.9149E−03 −5.3734E−02   3.4449E−02 −1.1808E−02   2.1328E−03 −1.9149E−04  6.8384E−06 R12  4.0241E+01  5.0512E−02 −6.3989E−02   2.8713E−02 −7.2505E−03   1.0303E−03 −7.5400E−05  2.2007E−06 R13 −5.6486E−01 −8.6515E−02 2.3695E−02 −1.9248E−03 −5.3748E−05   1.8882E−05 −1.1531E−06  2.3668E−08 R14 −2.4052E+01 −5.4550E−02 1.7171E−02 −3.1503E−03 3.3458E−04 −2.0992E−05  7.2582E−07 −1.0562E−08

Table 15 and table 16 show design data of inflexion points and arrest points of respective lens in the camera optical lens 40 according to Embodiment 4 of the present disclosure.

TABLE 15 Number of Inflexion Inflexion Inflexion Inflexion inflexion point point point point points position 1 position 2 position 3 position 4 P1R1 1 1.805 P1R2 1 0.785 P2R1 P2R2 P3R1 1 0.365 P3R2 2 0.535 1.595 P4R1 2 0.405 1.455 P4R2 2 0.045 1.695 P5R1 2 0.665 2.095 P5R2 2 0.515 2.345 P6R1 2 0.705 2.215 P6R2 4 0.335 0.555 2.255 2.745 P7R1 1 1.645 P7R2 2 0.535 3.465

TABLE 16 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 P1R2 1 1.565 P2R1 P2R2 P3R1 1 0.615 P3R2 1 0.885 P4R1 2 0.735 1.715 P4R2 2 0.075 1.895 P5R1 1 1.235 P5R2 1 1.125 P6R1 1 1.275 P6R2 P7R1 1 3.105 P7R2 1 1.095

In addition, Table 21 below further lists various values of Embodiment 4 and values corresponding to parameters which are specified in the above conditions.

FIG. 14 illustrates a longitudinal aberration of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 40 according to Embodiment 4, and FIG. 15 illustrates a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 40 according to Embodiment 4. FIG. 16 illustrates a field curvature and a distortion of light with a wavelength of 587 nm after passing the camera optical lens 40 according to Embodiment 4, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the camera optical lens 40 according to this embodiment, 2ω=78.89° and Fno=1.43. Thus, the camera optical lens 40 can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

Embodiment 5

FIG. 17 is a schematic diagram of a structure of a camera optical lens 50 in accordance with Embodiment 5 of the present disclosure. Embodiment 5 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 17 and Table 18 show design data of a camera optical lens 50 in Embodiment 5 of the present disclosure.

TABLE 17 R d nd νd S1 ∞ d0= −0.775 R1 2.410 d1= 1.339 nd1 1.5357 ν1 74.64 R2 7.469 d2= 0.092 R3 4.685 d3= 0.230 nd2 1.6610 ν2 20.53 R4 3.877 d4= 0.616 R5 21.547 d5= 0.268 nd3 1.6610 ν3 20.53 R6 5.944 d6= 0.060 R7 11.046 d7= 0.568 nd4 1.5444 ν4 55.82 R8 33.411 d8= 0.181 R9 2.528 d9= 0.311 nd5 1.6359 ν5 23.82 R10 2.706 d10= 0.371 R11 2.774 d11= 0.558 nd6 1.5444 ν6 55.82 R12 −23.424 d12= 0.550 R13 −4.175 d13= 0.511 nd7 1.5346 ν7 55.69 R14 3.770 d14= 0.615 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.219

TABLE 18 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10 A12 A14 A16 R1 −3.7161E−02  5.8219E−05 1.7570E−04 −6.7507E−04 4.3127E−04 −1.7291E−04  3.1050E−05 −3.2312E−06 R2 −1.1126E+01 −3.2392E−02 1.6424E−02 −6.0661E−03 1.4919E−03 −3.5814E−04  7.5855E−05 −8.1548E−06 R3  4.4044E+00 −5.8417E−02 2.9296E−02 −8.4761E−03 2.7918E−03 −1.1615E−03  3.4662E−04 −3.2989E−05 R4  5.1002E+00 −3.1945E−02 4.9082E−03  2.2370E−02 −2.8406E−02   1.7335E−02 −5.5166E−03  7.3610E−04 R5  4.8784E+01 −5.0162E−02 2.8325E−02 −5.4257E−02 5.0830E−02 −2.6708E−02  7.1053E−03 −7.1747E−04 R6 −8.5422E+01 −3.9213E−02 4.7513E−02 −7.3590E−02 5.2522E−02 −2.1896E−02  5.1556E−03 −5.0736E−04 R7  9.6979E+00 −4.8049E−02 4.4282E−02 −4.3504E−02 1.9439E−02 −4.0559E−03  3.8199E−04 −9.9600E−06 R8 −9.0000E+01 −5.8058E−02 1.8325E−02 −1.1211E−02 3.4193E−03  1.1427E−04 −2.8370E−04  4.3892E−05 R9 −1.9586E+01 −2.0683E−02 −3.6221E−03   1.4413E−02 −1.2157E−02   4.0950E−03 −6.4185E−04  3.9105E−05 R10 −1.3929E+01 −7.5839E−02 2.6159E−02  5.8005E−03 −9.3112E−03   3.1306E−03 −4.4310E−04  2.3194E−05 R11 −6.1618E+00  2.8219E−03 −5.3561E−02   3.4424E−02 −1.1811E−02   2.1324E−03 −1.9152E−04  6.8431E−06 R12  4.8362E+01  5.0172E−02 −6.4026E−02   2.8712E−02 −7.2505E−03   1.0303E−03 −7.5398E−05  2.2012E−06 R13 −5.7985E−01 −8.6469E−02 2.3698E−02 −1.9246E−03 −5.3726E−05   1.8883E−05 −1.1533E−06  2.3646E−08 R14 −2.3862E+01 −5.4419E−02 1.7175E−02 −3.1499E−03 3.3460E−04 −2.0991E−05  7.2585E−07 −1.0560E−08

Table 19 and Table 20 show design data of inflexion points and arrest points of respective lens in the camera optical lens 50 according to Embodiment 5 of the present disclosure.

TABLE 19 Number of Inflexion Inflexion Inflexion Inflexion inflexion point point point point points position 1 position 2 position 3 position 4 P1R1 1 1.785 P1R2 1 0.775 P2R1 P2R2 P3R1 1 0.295 P3R2 2 0.515 1.515 P4R1 2 0.505 1.485 P4R2 2 0.215 1.745 P5R1 2 0.715 2.135 P5R2 2 0.545 2.335 P6R1 2 0.745 2.245 P6R2 4 0.325 0.565 2.265 2.745 P7R1 1 1.635 P7R2 2 0.545 3.425

TABLE 20 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 P1R2 1 1.515 P2R1 P2R2 P3R1 1 0.515 P3R2 1 0.895 P4R1 2 0.885 1.745 P4R2 2 0.365 1.935 P5R1 1 1.335 P5R2 1 1.215 P6R1 1 1.315 P6R2 P7R1 1 3.055 P7R2 1 1.115

In addition, Table 21 below further lists various values of Embodiment 5 and values corresponding to parameters which are specified in the above conditions.

FIG. 18 illustrates a longitudinal aberration of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 50 according to Embodiment 5, and FIG. 19 illustrates a lateral color of light with wavelengths of 486 nm, 588 nm and 656 nm after passing the camera optical lens 50 according to Embodiment 5. FIG. 20 illustrates field curvature and distortion of light with a wavelength of 587 nm after passing the camera optical lens 50 according to Embodiment 5, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

In the camera optical lens 50 according to this embodiment, 2ω=78.55° and Fno=1.43. Thus, the camera optical lens 50 can achieve a high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses having a big aperture.

Table 21 below lists various values of Embodiments 1, 2, 3, 4 and 5 and values corresponding to parameters which are specified in the above conditions (1), (2), (3) and (4) and values of relevant parameters.

TABLE 21 Embodiment Embodiment Embodiment Embodiment Embodiment 1 2 3 4 5 Notes f2/f1 −7.4 −6.25 −7.21 −10.6 −6.31 Condition (1) d7/d6 8.21 6.02 9.45 8.03 9.47 Condition (2) (R7 + R8)/(R7 − R8) −1.41 −1.88 −1.06 −1.04 −1.99 Condition (3) d1/d2 10.77 11.47 11.19 8.5 14.55 Condition (4) Fno 1.43 1.43 1.43 1.43 1.43 2ω 78.07 78.73 78.97 78.89 78.55 f 5.563 5.495 5.486 5.452 5.482 f1 6.169 6.157 6.182 6.219 6.081 f2 −45.641 −38.478 −44.596 −65.907 −38.370 f3 −18.255 −19.017 −19.013 −18.482 −12.503 f4 26.136 25.363 25.655 27.189 30.043 f5 −30.124 −31.989 −32.235 −31.661 36.005 f6 4.315 4.307 4.331 4.353 4.590 f7 −3.750 −3.727 −3.735 −3.730 −3.625 TTL 6.684 6.696 6.698 6.677 6.699 IH 4.595 4.595 4.595 4.595 4.595

It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present disclosure. In practice, one having ordinary skill in the art can make various modifications to these embodiments in forms and details without departing from the spirit and scope of the present disclosure. 

What is claimed is:
 1. A camera optical lens, comprising, from an object side to an image side: an aperture; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power, wherein the camera optical lens satisfies following conditions: −11.00≤f2/f1≤−6.00; and 5.00≤d7/d6≤10.00, where f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; d7 denotes an on-axis thickness of the fourth lens; and d6 denotes an on-axis distance from an image side surface of the third lens to an object side surface of the fourth lens.
 2. The camera optical lens as described in claim 1, further satisfying a following condition: −2.00≤(R7+R8)/(R7−R8)≤−1.00, where R7 denotes a curvature radius of the object side surface of the fourth lens; and R8 denotes a curvature radius of an image side surface of the fourth lens.
 3. The camera optical lens as described in claim 1, further satisfying a following condition: 8.00≤d1/d2≤15.00, where d1 denotes an on-axis thickness of the first lens; and d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens. 